package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.dto.DishStatusDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishCategoryMapper;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;

@Service
public class DishServiceImpl implements DishService {
    @Autowired
    private DishMapper dishMapper;

    @Autowired
    private DishFlavorMapper dishFlavorMapper;

    @Autowired
    private SetmealDishMapper setmealDishMapper;

    @Autowired
    private DishCategoryMapper dishCategoryMapper;
/*新增菜品和对应口味*/
    @Override
    @Transactional     //事务控制
    public void saveWithFlavor(DishDTO dishDTO) {
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO,dish);
        //向菜品表插入一条数据
        dishMapper.insert(dish);

        //获取insert语句生成的主键值
        Long dishId = dish.getId();

        List<DishFlavor> flavors = dishDTO.getFlavors();
        if(flavors!=null &&flavors.size()>0){
            flavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(dishId);
            });
            //口味表插入n条数据
            dishFlavorMapper.insertBatch(flavors);
        }
    }

    @Override
    public PageResult pageQuery(DishPageQueryDTO dishPageQueryDTO) {
        PageHelper.startPage(dishPageQueryDTO.getPage(),dishPageQueryDTO.getPageSize());
        Page<DishVO> page = dishMapper.pageQuery(dishPageQueryDTO);
        return new PageResult(page.getTotal(),page.getResult());
    }


    /*批量删除*/
    @Override
    @Transactional
    public void deleteBatch(List<Integer> ids) {
        //*当前菜品处于起售中，不能删除
    for(Integer id:ids){
        Dish dish = dishMapper.getById(id);
        if(dish.getStatus() == StatusConstant.ENABLE){
            //
            throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
        }
    }
        /* 判断当前菜品是否可以删除--被套餐关联的菜品不能删除--- */
        List<Integer> setmealIds = setmealDishMapper.getSetmealIdsByDishIds(ids);
        if(setmealIds!=null && setmealIds.size()>0){
            //当前菜品被套餐关联 不能删除
            throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
        }

        /* 删除菜品后 ,关联的口味数据也需要删除*/
        for (Integer id : ids) {
            dishMapper.deleteById(id);
            dishFlavorMapper.deleteByDishId(id);
        }

    }

    @Override
    public DishVO getByIdWithFlavor(Integer id) {
        //根据id查询菜品数据
        Dish dish = dishMapper.getById(id);
        //根据菜品id 查询口味数据
        List<DishFlavor> dishFlavors = dishFlavorMapper.getByDishId(id);
        //将查询到的数据封装到VO
        DishVO dishVO = new DishVO();
        BeanUtils.copyProperties(dish,dishVO);
        dishVO.setFlavors(dishFlavors);  //flavors 包括dishid id name 等
        return dishVO;
    }



    /*根据id修改菜品基本信息和对应口味信息*/
    @Override
    public void updateWithFlavor(DishDTO dishDTO) {
        //修改菜品表基本信息 dishDTO转dish 因为dish表中没有flavor
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO,dish);
        dishMapper.update(dish);
        //删除所有口味数据 根据dish的id
        dishFlavorMapper.deleteByDishId(Math.toIntExact(dishDTO.getId()));
        //重新插入口味数据
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if(flavors!=null &&flavors.size()>0){
            flavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(dishDTO.getId());
            });
            //口味表插入n条数据
            dishFlavorMapper.insertBatch(flavors);
        }
    }

    /*菜品停售 对应的套餐也应该停售*/
    @Override
    public void startOrStop(DishStatusDTO dishStatusDTO) {
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishStatusDTO,dish);
        dishMapper.startOrstop(dish);
        //给setmealdish传入对应的dishid 对应套餐也停售
        setmealDishMapper.startOrStop(dishStatusDTO.getId(),dishStatusDTO.getStatus());

    }

    @Override
    public List<Dish> getByCategoryId(Integer categoryId) {
        return null;
    }

    /**
     * 根据分类id查询菜品
     * @param categoryId
     * @return
     */
    public List<Dish> list(Long categoryId) {
        Dish dish = Dish.builder()
                .categoryId(categoryId)
                .status(StatusConstant.ENABLE)
                .build();
        return dishMapper.list(dish);
    }


    /**
     * 条件查询菜品和口味
     * @param dish
     * @return
     */
    public List<DishVO> listWithFlavor(Dish dish) {
        List<Dish> dishList = dishMapper.list(dish);

        List<DishVO> dishVOList = new ArrayList<>();

        for (Dish d : dishList) {
            DishVO dishVO = new DishVO();
            BeanUtils.copyProperties(d,dishVO);

            //根据菜品id查询对应的口味
            List<DishFlavor> flavors = dishFlavorMapper.getByDishId(Math.toIntExact(d.getId()));

            dishVO.setFlavors(flavors);
            dishVOList.add(dishVO);
        }

        return dishVOList;
    }
}
